authorities believe 25-year-old lopez from the pacifica california shot both marines before killing himself. it is still under investigation. >>> new york mayor, michael bloomberg, is behind a new round of ads that are aimed at gun control. mayors against illegal guns. they've actually got $12 million worth of airtime for this ad. >> my dad taught me to hunt and i'll teach my kids. i've owned a gun all my life and i'll fight for my right to keep it. background checks have nothing to do with taking guns away from anyone. closing loopholes will stop criminals and the dangerously mentally ill from buying guns. that protects my right and my family. >> this effort is a group's most expensive yet to influence the debate over gun control. thursday more than 100 demonstrations and special events are planned in support of universal background checks. those ad as start running in 13 states on tuesday. >>> in alabama, birmingham officials are still investigating the horoific death of a 10-year-old kansas boy. the executive chairwoman released this statement yesterday. >> i'd like to extend our heartfe